Ettore btraatti



y 5, 9 E. BUGATTI 1.721331 INE MI! I III i .ll H ulllm: 'IHI Patented July 16, 1929.

UNITED STATES ETTOBEBUGATTI, OF MOLSHEIM, FRANCE.

FLOAT VALVE FOR AUTOMOBILE RADIATORS.

Application filed September 27, 1928, Serial No. 308,741, and in France November 24, 1927.

My invention relates to a device for automatically controlling the water in radiators for internal combustion engines.

As is known in the art, almost all automobile radiators are arranged in such a way that they cannot build up pressure in the interior oi? the radiator and tor this purpose they are provided at their upper partwith' an overflow pipe from which the expanding water or steam when it forms is enabled to escape.

\Vhen an automobile is running at very high speed and. the brakes are a1. plied, the water in the cylinders by its inertia, becomes suddenly thrown to the front oi? the radiator. llurthermore, when the brakes are applied, the gas is turned oil. and the clutch discu gagged, and since the motor suddenly slows up and the water circulating pump nearly comes to a stop, the water which is above the pump continues its movement by its kinetic energy and accunuilates inthe lower part of the rzuliator, which no longer responds to the suction produced at its upper part by the pump, which suction aided the water to pass quickly through the honeycomb sections.

All these phenomena taking place simultaneously, produce a sudden congestion in the upper part of the radiator in such a way that the water tends to flood the ovcrflow pipe, and since these phenomena are itrequcntl y repeated during a trip, considerable loss in water takes place.

My invention has for an object to eliminate this diszulvantagre entirely and consists essentially in providing a water controlling dcvice with a float acting; as a valve suitably dis tiosed at the upper part of the radiator.

The following description when taken in connection with the accompanying drawing,

40 by way of example, will readily reveal to those skilled in the art how the invention is carried into practice.

in the drawing- Fig. l is a :tragnicntary section through a radial'mi with my invention applied; and

Fig. 2 is a sectional detail similar to Fig. 1 slunvin r the position of the parts during \\'ater congestion.

According to my invention, the water filling neck or spout I) is provided at its lower end with a large opening a, through which filling of the radiator takes place, the cooling elcn'lents, such as a honeycomb section, being represented conventionally at Min the .lorm and. dash. lines, (Fi .lli ild iilellldl said.

- A a I is disposed a. idrfat c idod by a perforate housing f. At (Z is shown the over spout 0 open. lVhen a congestion of water is produced (Fig. 2), the level ofwater rises suddenly to thetop of the radiator and establishes immediate closure of the opening a.

through the float ejwhich thus serves as an" automatic valve.

Under these conditions, the water cannot enter the spout I) through the opening a and consequently is prevented from leaving through the overflow pipe (Z. The holes 0 prevent the communication between the radiator from becoming cut off and allow water to escape into the spout Z2, but since the holes 0 are relatively small and the period of the congestion is rather brief, the level in the spout Z) will never attain the over-flow pipe and as soon as the equilibrium is reestablished in the water of the radiator, the float a will drop and allow the slight amount of water accunudated in the spout to enter the radiator.

ll hile I have described what I deem to be the preterred form of my device I do not wish to be limited thereto as there might be various changes made in the arrangement and construction of parts Without departing from the spirit of my invention as comprehended within the scope of the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent is 1. A safety device forradiators of the type described, conuorising a filling spout, an overflow pipe extending into said spout, a plurality of small openings formed in said spout adjacent the top thereof adapted to establish communication between the interior of said radiator and said spout, and means responsive to the rise of water in said radiator for cutting oflfcommunication of said spout with said radiator for the purpose disclosed.

2. A safety device for radiators of the type described, couprising a filling spout, anoverflow pe e. n mto SHJCl SlJC lll plurallty 3 r y, 9. race forme t sub jacent the top thereof adapted to establish communication between the interior of said radiator and said spent, and a float valve adapted to close the end of said spout upon a rise of water in said radiator for the purpose disclosed.

3. A safety device for radiators of the type described, comprising a filling spout extending into said radiator, an over-flow pipe extending into said spent, a plurality of small openings formed in said spout adjacent the top thereof adapted to establish communication between the interior of said radiator and said spent. and a float valve adapted to close the end of said filling spout upon a rise of Water therein for the purpose disclosed.

t. A safety device for radiators of the type described, comprising a filling spout extend-- ing into said radiator, an over-flow pipe extending into said spout, a plurality of small openings formed in said spout adjacent the top thereof adapted to establish communication between the interior of said radiator and said spent, a perforate sleeve secured beneath said spent, a valve seat formed in the lower end of said spout, and a float slidably mounted in said perforate sleeve adapted to contact with said valve seat upon a rise of water in said sleeve for the purpose disclosed.

In testimony whereof I have signed this specification.

ETTORE BUGATTI. 

